Demise of one volcanic zone and birth of another; a 12 m.y. marine record of major rhyolitic eruptions from New Zealand

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doi: 10.1130/0091-7613(2003)031<0493:DOOVZA>2.0.CO;2
Author(s): Carter, Lionel; Shane, Philip; Alloway, Brent; Hall, Ian R.; Harris, Sara E.; Westgate, John A.
Author Affiliation(s): Primary:
National Institute of Water and Atmospheric Research, Wellington, New Zealand
Other:
University of Auckland, New Zealand
Geological and Nuclear Sciences, New Zealand
Cardiff University, United Kingdom
Sea Education Association, United States
University of Toronto, Canada
Volume Title: Geology (Boulder)
Source: Geology (Boulder), 31(6), p.493-496. Publisher: Geological Society of America (GSA), Boulder, CO, United States. ISSN: 0091-7613 CODEN: GLGYBA
Note: In English. 20 refs.; illus., incl. 1 table, sketch map
Summary: Ocean Drilling Program Sites 1123 and 1124 provide an unprecedented 12 m.y. record of major rhyolitic eruptions from the Coromandel and Taupo volcanic zones of New Zealand. Macroscopic tephras (n = 197) were dated using magnetostratigraphy, supplemented by geochemical correlation with subaerial tephra, isothermal plateau fission-track ages, and orbitally tuned stable isotope data. Eruptions began in the Coromandel volcanic zone ca. 12 Ma, ∼1.6-1 m.y. earlier than previously known. Thereafter, volcanism was fairly continuous with a tempo and intensity that increased through the late Miocene-Pliocene and into the Quaternary, when the Taupo volcanic zone formed. The transition from the Coromandel to the Taupo zone, previously placed as ca. 4-2 Ma, was seamless, without obvious breaks or changes in ash composition. This well-dated history of long-lived and productive volcanism allows for more confident correlation with other circum-Pacific tephra records, thus helping confirm the occurrence of widespread coeval eruptions throughout the region.
Year of Publication: 2003
Research Program: ODP Ocean Drilling Program
Key Words: 05 Petrology, Igneous and Metamorphic; 12 Stratigraphy, Historical Geology and Paleoecology; Australasia; Cenozoic; Chatham Rise; Coromandel Peninsula; Correlation; Eruptions; Geochemistry; Igneous rocks; Leg 181; Leg 182; Lithostratigraphy; Magnetostratigraphy; Miocene; Neogene; New Zealand; North Island; ODP Site 1123; ODP Site 1134; Ocean Drilling Program; Pacific Ocean; Pliocene; Pyroclastics; Quaternary; Rhyolites; South Pacific; Taupo volcanic zone; Tertiary; Upper Miocene; Volcanic rocks; Volcanism
Coordinates: S333144 S333144 E1271550 E1271550
S414710 S414710 W1712956 W1712956
Record ID: 2003045526
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States